One vertex per element, one color per generator, with an edge from x to x·s.
(5,6,10,13)(7,9,12,17)(8,11,16,19)(14,20,18,15)(21,22)(23,26)(24,27)(25,29)(28,32)(30,34)(31,33)(35,36)(1,2)(3,4)(5,7)(6,9)(8,14)(10,12)(11,15)(13,17)(16,18)(19,20)(21,23)(22,26)(24,31)(25,30)(27,33)(28,35)(29,34)(32,36) involution — undirected(2,4)(5,8)(6,11)(7,14)(9,15)(10,16)(12,18)(13,19)(17,20)(22,27)(24,32)(26,33)(28,29)(31,36)(34,35) involution — undirected(5,9)(6,12)(7,13)(8,15)(10,17)(11,18)(14,19)(16,20)(23,30)(26,34)(31,36)(33,35) involution — undirectedA Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.